[mpich-discuss] open failed for root's mpd conf

[Dave Goodell]

Well, if my earlier suggestion about "/etc/mpd.conf" doesn't solve the  
problem, then I am not entirely sure what is going on.

I just took a peek at the code and it looks like we may have a bug in  
the root mpd.conf search path that was introduced in r5844.  We now  
search "@sysconfdir@/mpd.conf" (which expands to "${prefix}/etc/ 
mpd.conf" normally) instead of "/etc/mpd.conf".  So I'm betting that  
you have a valid "/etc/mpd.conf" but mpdroot is looking for it in "/ 
usr/etc/mpd.conf" instead.

Can you try two things for me?  First run the following command and  
send us the output: "strings /usr/bin/mpdroot | grep etc".  Second,  
try setting the environment variable "MPD_CONF_FILE=/etc/mpd.conf"  
before running mpiexec.  That may let you work around the problem for  
now.  Alternatively you could probably move your "/etc/mpd.conf" to  
the "/usr/etc/" directory.

-Dave

On Mar 17, 2010, at 3:59 PM, rcx11 at yahoo.com wrote:

> That is exactly what I'm trying to do - run on a root started ring  
> as a normal user. I get no errors when running as root.
>
> --- On Wed, 3/17/10, Dave Goodell <goodell at mcs.anl.gov> wrote:
>
>> From: Dave Goodell <goodell at mcs.anl.gov>
>> Subject: Re: [mpich-discuss] open failed for root's mpd conf
>> To: mpich-discuss at mcs.anl.gov
>> Date: Wednesday, March 17, 2010, 3:46 PM
>> Just to be sure, you are trying to to
>> use a root-started mpd ring as a
>> regular user, correct?  If so, make sure that you have
>> a mode 600 file
>> named "/etc/mpd.conf" (no leading ".") containing the
>> secret word.
>>
>> If you are trying to use a regular user-started mpd ring as
>> a regular
>> user, then remove "MPD_USE_ROOT_MPD=yes" from your
>> "~/.mpd.conf".
>>
>> -Dave
>>
>> On Mar 17, 2010, at 3:33 PM, rcx11 at yahoo.com
>> wrote:
>>
>>> It's "MPD_USE_ROOT_MPD=yes" as per setup guide in the
>> link given.
>>>
>>> --- On Wed, 3/17/10, Dave Goodell <goodell at mcs.anl.gov>
>> wrote:
>>>
>>>> From: Dave Goodell <goodell at mcs.anl.gov>
>>>> Subject: Re: [mpich-discuss] open failed for
>> root's mpd conf
>>>> To: mpich-discuss at mcs.anl.gov
>>>> Date: Wednesday, March 17, 2010, 3:02 PM
>>>> On Mar 17, 2010, at 2:50 PM, rcx11 at yahoo.com
>>>> wrote:
>>>>
>>>>> I've been searching through documentation
>> trying to
>>>> find why I'm getting the error when trying to run
>> as a
>>>> non-root user. I'm running Fedora 12 x86 and have
>> installed
>>>> MPICH2 via yum. I've got my mpd.conf files created
>> according
>>>> to http://debianclusters.cs.uni.edu/index.php/MPICH_without_Torque_Functionality
>>
>>>> .
>>>> When trying to run mpiexec as a non-root user, I
>> get the
>>>> error "/usr/bin/mpdroot: open failed for root's
>> mpd conf
>>>> filempiexec_sebastian.ags-rolla.zapto.org
>> (__init__ 1208):
>>>> forked process failed; status=255" What is causing
>> this?
>>>>
>>>> Please see section 5.1.6 of the Installer's Guide:
>> http://www.mcs.anl.gov/research/projects/mpich2/documentation/files/mpich2-1.2.1-installguide.pdf
>>>>
>>>> Do you have "MPD_USE_ROOT_MPD=1" set somewhere in
>> your
>>>> environment or mpd.conf file?
>>>>
>>>> -Dave
>>>>
>>>> _______________________________________________
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>>>> mpich-discuss at mcs.anl.gov
>>>> https://lists.mcs.anl.gov/mailman/listinfo/mpich-discuss
>>>>
>>>
>>>
>>>
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